Received cll to my office today for an employee who works in the field and not in the office.  He argued with everyone on my staff who answered the telephone.  We finally got this number and the name Albert Fredrick out of him.  He would not give us his business name or a supervisor.  Called us "liars" for telling him the employee was not in the office.  Extremely argumentative and horrible.  Then all six of our telephone lines starting ringing and noone was there.  This continued in excess of 20 minutes.